Need Recommendations on how to get 500bhp

[DEANGE2001]

Hey everyone,

So I have already done a few mods (LSR CAI and custom tune with SCT tuner, borla s axle back exhaust) and I have not dyno tuned my car but based on the numbers given by the manufacturers it looks like I roughly have added 42bhp to my car. I am looking to get to 500bhp but I do not want to spend a ton of money (ie supercharger, twin turbo etc).

Right now I am roughly at 470bhp, but I am looking to get an extra 30ish bhp to bring me to 500 at the crank~430hp at the wheels.

Any suggestions on how to do this with bolt on mods? or do I have to go to LT headers/cam shaft or something of the likes. I was hoping to avoid any major additions but I guess that my not be feasible.

Any and all suggestions are welcomed/appreciated.

[SilverSS3108]

Try high flow cats... Heard good things about them and a vmax TB

[Mindz]

hi flow cats should be good enough to get you there, or at least 495 bhp. The TB doesn't seem to get any hp gains, but the throttle response is improved slightly. If you want to be sure you're over 500, get longtube headers.

[chrisp@lsrperformance.com]

You will need to do the exhaust work to get to 500 horsepower. Take a look at Kooks products. We have been very pleased with the gains. I will PM you some information

chris@lsrperformance.com
lsrperformance.com
229-245-9045

[axis]

Do you really think you got 42hp from your CAI and tune? That would be the most i've EVER heard of. The catback is considered a sound mod only.

[Hess Motorsports]

The 42 he is talking about is flywheel power gains given by the manufacturers. That isn't too hard to believe. Tunes, if done properly, can add anywhere from 15 to 30 depending on how the car comes out of the factory (i.e. Monday car vs Friday car).

As for 450 WHEEL horsepower, you will probably have to go with a set of LT headers. Cat backs do add a littel bit of power but don't really even show much on the seat of the pants dynos on this forum. Honestly though, find a good tuner becuase the minute you add the LTs, you will have to get tuned. Moving the HEGO's and changing exhaust pulses and temperatures play havoc on fuel trims.

[DEANGE2001]

Thanks for all the advice guys...if there are any other recommendations, please hit me up.

[Tshepp]

Long tubes and exhaust were by far the best thing I've done on this car (cam isn't in for a couple weeks) so I would highly recommend long tubes.

[DEANGE2001]

Originally Posted by Hess Motorsports

The 42 he is talking about is flywheel power gains given by the manufacturers. That isn't too hard to believe. Tunes, if done properly, can add anywhere from 15 to 30 depending on how the car comes out of the factory (i.e. Monday car vs Friday car).

As for 450 WHEEL horsepower, you will probably have to go with a set of LT headers. Cat backs do add a littel bit of power but don't really even show much on the seat of the pants dynos on this forum. Honestly though, find a good tuner becuase the minute you add the LTs, you will have to get tuned. Moving the HEGO's and changing exhaust pulses and temperatures play havoc on fuel trims.

So, just to clarify, it sounds like I would only have to do LT headers? I do not think I would do the full cat-back exhaust as I do not see much power gains from that (sure the pipes would be a bit straighter but I believe it is the same diameter as the stock pipes...any thoughts)

[sspaul]

cai, full exhaust(lt's and catback), you can also add an underdrive pulley and ported throttle body, and a good dyno tune, might also want to look at a ported manifold

[SGOS252382]

426hp to 500hp is 74hp. That's beyond what most guys are making with basic bolt on mods.

Most LS3s go from around 370 -375 rwhp to 410-415 rwhp with intake, long tube headers, high flow cats, and a tune. Thats a 40hp gain (on average) with those mods (including long tube headers and high flow cats).


The L99s go from around 320 - 330 rwhp to 360-370 rwhp with the same setup.


So don't take the manufacturers claims for HP.

[mrvenicess]

Originally Posted by SGOS252382

426hp to 500hp is 74hp. That's beyond what most guys are making with basic bolt on mods.

Most LS3s go from around 370 -375 rwhp to 410-415 rwhp with intake, long tube headers, high flow cats, and a tune. Thats a 40hp gain (on average) with those mods (including long tube headers and high flow cats).


The L99s go from around 320 - 330 rwhp to 360-370 rwhp with the same setup.


So don't take the manufacturers claims for HP.

I agree with you there. I have intake, Kooks LTs and cats, Vmaxx TB, Borla S cat back and a tune. Ran it on the dyno today and got 405 rwhp. Granted it was 99 F out and very humid so maybe under better conditions might pick up a few more hp but thats it. I saw some one post that their CAI and tune gave them 40hp! Come on now people! Lets get real with some of these claims!

[ssmike]

Yea in the real world you could expect 415 rwhp with LT's, catted mids, a good cai, and a tune. The Vmax ported throttle body won't hurt but don't expect more than a couple hp. To get more than 415 the next step would be a cam, then your talking 450+ rwhp! Ted Jannetty sells his 415 package which is LT's, CAI, and tune and it IS real world what to expect. Manufacturers claims are ALWAYS a little high!

[axis]

Why are you aiming for a HP goal at the crank? Why not pick a number that you can easily measure with a dyno? You're assuming that your car has exactly 426 hp at the crank. It could have more or less. Sounds like you just want to be able to say your car puts out 500hp.

[Jason 98 TA]

Checkout the Texas Speed 304 stainless polished headers, if your wanting to go for 500 flywheel hp.

http://www.texas-speed.com/p-2168-te...ro-ss-62l.aspx

[mikeSS]

Originally Posted by DEANGE2001

So, just to clarify, it sounds like I would only have to do LT headers? I do not think I would do the full cat-back exhaust as I do not see much power gains from that (sure the pipes would be a bit straighter but I believe it is the same diameter as the stock pipes...any thoughts)

you need a cam. and you don't have 470HP.

Originally Posted by axis

Why are you aiming for a HP goal at the crank? Why not pick a number that you can easily measure with a dyno? You're assuming that your car has exactly 426 hp at the crank. It could have more or less. Sounds like you just want to be able to say your car puts out 500hp.

well its good to know what your crank HP is. most people out in the world do not know what WHP means. i asked my shop after my dyno run what should my crank HP be around. they said 510-515. so thats what i tell people how much HP i have.

[DEANGE2001]

Originally Posted by mrvenicess

I agree with you there. I have intake, Kooks LTs and cats, Vmaxx TB, Borla S cat back and a tune. Ran it on the dyno today and got 405 rwhp. Granted it was 99 F out and very humid so maybe under better conditions might pick up a few more hp but thats it. I saw some one post that their CAI and tune gave them 40hp! Come on now people! Lets get real with some of these claims!

Yes...that was me, and I also the one who started the thread.

I understand it seems farfetched, but this was with a custom tune and that is 40hp (at the crank, so 40bhp)...so to me that is not that unrealistic but then again I am not an expert so what do I know. I will say though that I notice a significant difference in power so can guarantee it is certainly more than just the gains due to the intake, and I highly doubt that LSR would post this without any data to back it up, even to some degree (maybe 40 was the best gains they saw but on average were lower, i dont know)....

[mikeSS]

Originally Posted by DEANGE2001

Yes...that was me, and I also the one who started the thread.

I understand it seems farfetched, but this was with a custom tune and that is 40hp (at the crank, so 40bhp)...so to me that is not that unrealistic but then again I am not an expert so what do I know. I will say though that I notice a significant difference in power so can guarantee it is certainly more than just the gains due to the intake, and I highly doubt that LSR would post this without any data to back it up, even to some degree (maybe 40 was the best gains they saw but on average were lower, i dont know)....

well trust me, we have heard a good amount of false info by company s crazy clams. you should read up on shorty headers clams. LOL,

[DEANGE2001]

And I am not trying to be a dick to the majority of the people that have posted on hear (despite some of the ignorance/criticism, I still appreciate the feedback) but I thought people on this site were car guys/women??? When I say 470BHP that means at the crank or, in other words it is a theoretical number that is calculated under controlled conditions of what the true power of the engine is (nothing else is factored in such as losses to the AC, or powering the rest of the car etc).

And maybe everyone is right maybe I am no where close to where I think I am, but it does not matter, because I have utilized all the "bolt on" mods and I am still not where I want to be.....whether it be exactly what I stated or less.

Therefore most of you seem a little out of place on this thread because all I asked was

"So I have already done a few mods (LSR CAI and custom tune with SCT tuner, borla s axle back exhaust) and I have not dyno tuned my car but based on the numbers given by the manufacturers it looks like I roughly have added 42bhp to my car. I am looking to get to 500bhp but I do not want to spend a ton of money (ie supercharger, twin turbo etc)."

I did not ask for people to critique what I posted the specs were on my car.

[BubbaSS]

To get 500 bhp, you'll need about 420-425 whp...you should get a baseline dyno now and then work from there

[mikeSS]

Originally Posted by BubbaSS

To get 500 bhp, you'll need about 420-425 whp...you should get a baseline dyno now and then work from there

more like 435-440 to be a solid 500HP

[axis]

Originally Posted by DEANGE2001

I did not ask for people to critique what I posted the specs were on my car.

If you just want to say you have 500bhp, fudge the numbers like most of the manufacturers do. Since you're just going to quote the advertised numbers, add splitfires, or E3's, change to Amsoil, put a tornado in it, and add shorties. Using their advertised numbers along with the ones you've already taken onwnership of, you should be damn close. See how stupid that sounds? It's EXACTLY what you're doing.

Yes we are car guys and girls. We know that CAR PEOPLE don't care about what you're estimating at the crank. We want to know what you're putting to the ground, which is all that really matters. If you're worried about what your car is putting down at the crank, dyno it and do the estimated math. There's a reason why we don't have a sticky on "what's your estimated crank HP".

[DEANGE2001]

Originally Posted by axis

If you just want to say you have 500bhp, fudge the numbers like most of the manufacturers do. Since you're just going to quote the advertised numbers, add splitfires, or E3's, change to Amsoil, put a tornado in it, and add shorties. Using their advertised numbers along with the ones you've already taken onwnership of, you should be damn close. See how stupid that sounds? It's EXACTLY what you're doing.

Yes we are car guys and girls. We know that CAR PEOPLE don't care about what you're estimating at the crank. We want to know what you're putting to the ground, which is all that really matters. If you're worried about what your car is putting down at the crank, dyno it and do the estimated math. There's a reason why we don't have a sticky on "what's your estimated crank HP".

Hey! thanks for being an asshole buddy!

What does it matter to you if I want to know what the power is at the crank or at the wheels? It is of no concern to you.

I asked a simple question regarding advice on mods and I get people lecturing me (and being assholes )...and I dont really see why people take the time to do this. Being helpful is one thing...trying to be dick for no reason, i just dont get that.

[Robbie1227]

With the mods I have listed, which is most of the bolt ons, (I think) and a custom dyno tune, and I am only making 405 at the rear wheels!
I need more HP as well.
Cam and Heads, here I come!

[4thGen427CI]

Originally Posted by DEANGE2001

Hey! thanks for being an asshole buddy!

What does it matter to you if I want to know what the power is at the crank or at the wheels? It is of no concern to you.

I asked a simple question regarding advice on mods and I get people lecturing me (and being assholes )...and I dont really see why people take the time to do this. Being helpful is one thing...trying to be dick for no reason, i just dont get that.

I think you should just go back and reread some of the post... Several people have said what you need on a dyno to have 500 crank hp. 430-435 RWHP. I suggest just shoot for that on the dyno until you reach your goal. Good luck